ALEXANDRIA, Va., June 2 -- United States Patent no. 12,647,037, issued on June 2, was assigned to MORNSUN GUANGZHOU SCIENCE & TECHNOLOGY Co. LTD. (Guangdong, China).

"Cascade circuit and control method therefor" was invented by Pengfei Lu (Guangdong, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "A cascade circuit including a preceding-stage buck-boost circuit and a post-stage isolation switch power supply circuit is provided. One end of the switch transistor Q1 serves as a positive input of the buck-boost circuit, and the other end is connected to one end of the switch transistor Q2 and one end of the inductor L. The other end of the inductor L, one end of the switch transistor Q4, and one end of the ...